Freeze djangorestframework's(wagtail dependency) version as the latest version is not compatible with wagtail 1.12.2. Try fixing travis build error.
Freeze djangorestframework's(wagtail dependency) version as the latest version is not compatible with wagtail 1.12.2. Try fixing travis build error.

PARINetwork/pari,PARINetwork/pari,PARINetwork/pari,PARINetwork/pari